Stat Analysis

Advanced analytics on player and team performance

Broken Tackles 2014: Defenses

by Vincent Verhei

Earlier this week, we looked at broken tackles from the offense's point of view. Today we're going to turn things around and look at which defenses allowed the most runners to slip through their arms -- and which put them on the ground right away.

First, we must explain how we came to these totals. The next few paragraphs are going to be repeated from our earlier piece, so if you already read about offenses and missed tackles, feel free to skip down to the next subhead.

Historically, we have defined a "broken tackle" as one of two events: either the ball carrier escapes from the grasp of the defender, or the defender is in good position for a tackle but the ball carrier jukes him out of his shoes. If the ball carrier sped by a slow defender who dived and missed, that didn't count as a broken tackle. It also doesn't count as a broken tackle if a defender gets a hand on the ball carrier but is effectively being blocked out of the play by another offensive player. We only measure broken tackles for standard plays; volunteers didn't have the time to track them for all special teams plays.

This year, we added a third category, "dragged" broken tackles where defenders were able to bring the ball carrier to the ground, but only after the runner had gained at least 5 yards from the point where the tackle started. We seemed like a reasonable compromise to deal with plays we had struggled with in years past, where what looked like a broken tackle would end up with a defender getting marked with a tackle or assist by the NFL because he was the last player to make contact before a ballcarrier fell down ten yards later. There weren't very many of those plays; no defender was dragged more than four times last year.

We recorded significantly more broken tackles in 2014 than in any previous season, but we want to make it clear: that jump has to do with our methods. We don't want these numbers to encourage any "tackling in the NFL is getting worse" narratives. Between 2009 and 2013, league totals on broken tackles fell between 1,975 (2012) and 2,236 (2009). In 2014, we marked a total of 2,644 broken tackles.

The addition of "dragged" tackles was roughly half of the reason for the increase. The other reason was that any plays where ESPN Stats & Information marked a minimum of 5 yards after contact were specifically flagged to indicate to game charters that they should be particularly mindful of broken tackles. Unfortunately, it's the nature of charting to be subjective. We believe that flagging these plays for charters actually resulted in more accurate numbers than in previous seasons. But obviously, when comparing 2013 and 2014 totals below, be aware that the average player should have a 20-25 percent increase in broken tackles per play simply because of the change in our charting methodology.

The natural variation that comes with subjectivity is tempered by the fact that there were over two dozen charters involved, so no team's numbers could be overly slanted because of the bias of a single specific charter. (In addition, as we have done in past years, we spent time after the season reviewing plays from the charters with the highest and lowest rates of broken tackles marked.) We know that there are other groups on the Web who track broken tackles, and because of the subjectivity, their numbers won't be exactly the same as ours. Given the mistakes that are easy to make when marking players off of television tape, a difference of one or two broken tackles isn't a big deal. But looking at the players with the most and fewest broken tackles does a good job of showing us which defenders are stopping runners in their tracks, and which are getting trampled into the turf.

Broken Tackle 'Leaderboards'

The following table lists all defenders who gave up at least 10 broken tackles. It is nearly twice as long as last year's table, for all the reasons we listed above.